2973808638 has 48 divisors (see below), whose sum is σ = 6633900000. Its totient is φ = 962184960.

The previous prime is 2973808631. The next prime is 2973808681. The reversal of 2973808638 is 8368083792.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2973808631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136738 + ... + 156986.

It is an arithmetic number, because the mean of its divisors is an integer number (138206250).

Almost surely, 2^2973808638 is an apocalyptic number.

2973808638 is an abundant number, since it is smaller than the sum of its proper divisors (3660091362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2973808638 is a wasteful number, since it uses less digits than its factorization.

2973808638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20497 (or 20494 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The square root of 2973808638 is about 54532.6382820417. The cubic root of 2973808638 is about 1438.0401318236.

The spelling of 2973808638 in words is "two billion, nine hundred seventy-three million, eight hundred eight thousand, six hundred thirty-eight".